A cigarette or other tobacco smoke filter is disclosed which has a filamentary or fibrous cellulose acetate support carrying a stabilized mixture of zinc oxide and an alkali carbonate salt. The zinc oxide and the carbonate salt are dispersed in a plasticizer to form the stabilized mixture by a milling operation.
A cigarette filter has a filter medium containing an inorganic basic substance such as sodium carbonate and a moisturizing agent selected from the group consisting of glycerin, sodium propionate and sodium lactate.
